Furnace



Jan. 14, 1930.

W. J. BOESCH FURNACE Filed March 24, 1928 2 Sheets-Sheet 1 Jan. 14, 1930. w. J. BQEscH 1,744,021

` FURNACE Filed Mach 24, 1928 2 Sheets-Sheet 2 2 [3 9 j@ i l 4 5 31a/vento@ W. J. Bussen @Xy/IW Patented Jan. 14, 1930 UNITED STATES PATENT OFFICE WILLIAM: JOSEPH HOESCH, 0F IEORIA., ILLINOIS, ASSIGNOR T0 'TI-IE MEYER FURNACE A `C20., OF IEORIA, ILLINOIS, A CORPORATION 0F ILLINOIS FURNACE Application led March 24, 1928. Serial N o. 264,459.

This inventionpertains to improvements in heating apparatus. More particularly the invention pertains to the lnovel construction of a furnace of the hot air type,to a firepot therefor, and to the sectional construction of the latter. l

An object is to provide a fire pot construction in which the walls thereof are spaced from the walls of the furnace body, and to supply air entirely from outside the furnace to pass through the space thus provided for delivery upon the top of `the fire, in a well known way, said space being cut off entirely from the lire space and gra-te and the space below the latter to the end that the air thus inducted cannot affect the draft on the re.

Another object is to provide an annular hollow ring enclosing the lower part of the lire space and the grate, entirely closed olf from both and from the ash-pit, `but open outside the furnace, and to mount thereon a fire pot having its lire-space walls spaced from the body ofthe. furnace creating a space to communicate with the space of said ring, said wall of the fire-pot being perforated in a wellA known way and for a well known purpose, all of the air admitted being inducted from outside the furnace rather than through the grate and fire.

Another object is to provide a fire-pot of sections of novel form and the relation thereof to other parts of the furnace structure.

In the appended drawings forming part hereof, l i i Figure 1 is a sectionalelevation of part of a furnace constructed in accordance with the invention. i

Figure2 is a horizontalsectionof the same on line 2-7-2, Figure 1.

\ Figure 3 is a front elevation of part of the `furnace of my invention showing the furnace body `in section.v

Figure 4 shows in perspective a section of the `fire-pot-and an air ring upon which it is mounted, and

l Figure 5 is a transverse section of part of a fre-pot section and a parti shown in Figure 4. The construction shown, and herein to Vbe described, includes what I shall term the furknown steel drum riveted and welded and thoroughly gas tight. Supported therein on suitable brackets 2, for example, isa grate which comprises a ringportion 3 resting on said brackets and snugly fitting the said body 1. It includes suitable grate bars 4, Figures 1 and 2, and the inner edge has an upstanding flange 5. Resting upon the ring portion and abutting against the outside surface of said flange 5 is a ring comprising a vertical wall 6` forming an enclosure for the fuel resting upon the grate, and a wall 7 paralleling the ring portion 3 and abutting against the furnace body 1, an air space 8 being created in this manner which extends entirely around the lire space created by the wall 6. At a convenient point, in this instance in the front of the structure, is an opening 9 for entrance of air through a throat 1() leading from outside any usual outer enclosing fcasing 11, Figures 1 and 2.

Mounted upon the wall 7 is a series of firepot sections denoted in general by 12, 13 and 14. The sections 12, one of which is illustrated separately in Figure 4, each includes a curved inner wall 15 which together with the wall 6 described, form the fire space, these said walls being in alignment in this instance. Said wall 15 at its top curves back toward and abuts against the body 1, and each section has an end wall 16 to abut against neighboring sections, Figure 2, there being intermediate strengthening walls 17, Figure 4, all the walls mentioned abutting also upon the body 1.

Preferably, the ring 6, 7 has an upstanding flange 6 beneath the wall 15 upon which the latter rests, said wall 15, 16 and 17 being formed to correspond as at 62 preventing likelihood of .with air through an opening 7 in the top wall 7 of said ring 6, 7 which air passes out through perforations 18 of the sections upon the lire.

In order to provide an opening into the lire space for feeding fuel from the opening 19 shorter sections as 14 are provided as best shown in Figure'l. These sections are similar l of the air so admitted is permitted to enter the fire space through the grate or otherwise and the draft on the fire cannot be affected. In other words, any air admitted to the grate must be through the usual draft damper, not shown. Due to my improved structure air carried to and upon the fire through theperforations in the several sections 12, 13, 14 for gas consuming purposes is evenly distributed around the fire-pot from the fact that the openings 7 in the ring 6, 7 are comparatively small and each leads separately to a cell of the sections, each cell supplying its ownk air through the perforations in the top wall. If the cells were all open into the space 8 naturally the flow of air would be through the cells nearest the inlet 9. But as each separate cell is fed by a small opening, at 7", it is clear that the air distributed will be comparatively even throughout and especially if the said openings 7 are made larger as they recede in position from the said inlet 9. rI`he introduction of air jets to the fire space fromV the fire pot sections is well known but the distribution of the air through all of the perforations evenly around the fire space is important as providing for the best results in furnace op eration.

Although the fire-port may be a single member it is preferably made in sectionsfor convenience in installing and for'replacing individual sections as occasionarises.

While each of the sections l2, 13, 14 is described as including terminal walls 16, one at each side, I may use but one of such walls on a section and merely abut the open side of one section against the wall 16 of a next section, the one wall answering as two. However the form shown is preferred -as adding strength tothe unit of which it is a part and preventing distortion under heat, besides which an expansion joint is created between the abutting walls through which, however, dust or ashes cannot readily pass.

I claim:

1. A furnace including in its construction a body, a ring snugly fitting within the same and having a central opening inward from the body creating a grate-space, a second ring comprising a vertical wall sepa-rate from and erected upon the first named ring adjacent and enclosing the grate-space and forming a fire-space, said secondring. including an.an,.

nular wall extending outward therefrom abutting the body and lying above and paralleling the said first named ring in spaced relation thereto, the named two rings and the body together creating an annular cavity encircling the fire space, there being perforationsin the said annular wall, and a fire-pot mounted upon the said vertical wall spaced from the body and abutting at its top edge against the said body and perforated, and including a series of spaced walls radiating therefrom abutting the said annular wall, certain of the perforations in the annular wall communicating with the cavities between the said radial walls.

2. A furnace including in its construction a body and an annular hollow ring structure creating an annular enclosure outside the fire-space of said furnace, an upper wall of saidI structure having a series of apertures perforating it, and a fire-pot surmounting the structure comprising an inner fireewall spaced from the body, saidv fire-pot having a series of spaced integral vertical walls abutting upon the body and at their lower ends abutting on the ring structure creating closed vertical passages, said apertures opening into the several passages.

3. A furnace including inv its construction a body and an annular hollow ring structure creating an annular enclosure outside the firespace of said furnace, an upper wall of said structure having a series of apertures perforating it, and a series of abutting fire-poty sections mounted on the structure each com.- prising an inner lire wall spaced from the body and at its top extending to and abutting uponrthe latter and perforated, each saidl section having a series of spaced. integral outwardly directed vertical walls abutting upon the body and at their lower ends abutting upon the. ring structure creating` individual vertical passages between them, and said apertures communicating with the passages.

4. A furnace including in combination a furnace body and a perforated supporting ring therein, a hollow fire-pot section having a front fire-wall spaced from' the body and resting upon the ring, and including a. seriesv of walls extending from the rear side thereof, said front fire-wall at its upper portion extending outwardly over the severalwalls in abutment with the body, and said supporting ring creating closed passages between the body and the several walls of the section. for air travel from the perforations of the ring through the perforations of the said front fire-wall. 5. A fire-pot section for furnaces consisting of a single casting comprising a cylindrically curved main wall and radial walls extending from its convex side, one terminating each endrv of said main wall, all said radial walls having free edges lying remote from the main wall and paralling t-he the said rst ring and abuttin straight line surface thereof, the main Wall and the radial walls at one extremity being coextensive, and said main wall at its other extremity overlying the other extremities of the radial walls and terminating flush with their said free edges.

6. A fire-pot section for furnaces consisting of a single casting comprising a` cylindrically curved main wall and radial walls extending from its convex side, one terminating each end of said main wall, all said radial walls having free edges lying remote from the main wall and paralleling thev straight line surface thereof, the main wall and the radial walls at one extremity being coextensive, and said main wall at its other extremity overlying the other extremitiesof the radial walls and terminating flush with their said free edges, there being perforations in the overlying wall portion between the positions of the radial walls.

7. In a furnace structure, an enclosing furnace body, a ring supported by and fitting within and against the walls of said body, a second ring having a cylindrical wall resting upon and upstanding from the rst said ring and spaced from the body including an annular ange overhanging and spaced above upon the body, the two rings forming a c osed annular passage with and adjacent the latter, and a fire-pot resting upon the secondring com'- prising a main wall abutting upon the upstanding cylindrical wall of the latter and having spaced vertical radial walls integral therewith abutting against the body and abutting the said annular flange, the said main wall extending over and upon the upper portions of the said radial walls and abutting the body, there being an opening in that portion of the main wall that vextends over the said radial walls, each said opening lying between the positions of any two of the latter, and there being an opening in the first named ring between each of said radial Walls resting thereon.

In testimony whereof I affix my signature.

WILLIAM JOSEPH BOESCH. 

